CN116133143A - FTTR resource allocation method for guaranteeing channel robustness - Google Patents
FTTR resource allocation method for guaranteeing channel robustness Download PDFInfo
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Abstract
The invention discloses an FTTR resource allocation method for guaranteeing channel robustness, which belongs to the technical field of wireless communication and comprises the following steps: transmitting control signals to each user in the area through a 2.4Ghz frequency band by using all APs; receiving response signals to obtain SINR information and RSSI measured values corresponding to each user; the response signal also carries the transmission power and channel state information of each AP to each user; the control AP determines the communication frequency band to be 2.4G frequency band or 5G frequency band according to the SINR information of each user; and controlling the OLT to carry out resource scheduling decision according to the transmitting power, the transmitting power and the channel state information corresponding to each user so as to achieve the transmission rate of the maximum instantaneous data. When the AP and the user carry out data transmission, the invention improves the robustness of the transmission channels of the two communication frequency bands, can more accurately determine the condition that the user is connected with the AP, and optimally distributes bandwidth and transmitting power, thereby realizing efficient resource scheduling.
Description
Technical Field
The invention belongs to the technical field of wireless communication, and particularly relates to an FTTR resource allocation method for guaranteeing channel robustness.
Background
All-optical rooms (Fiber to The Room, FTTR) replace traditional network cables through the latest optical fibers, and gigabit broadband and gigabit Wi-Fi are brought into each room, office and even desktop to support digitalization, intellectualization and informatization of families, campuses and businesses, and super-gigabit full-house coverage is realized through a brand-new optical fiber+wi-Fi 6 technology. As optical network bandwidths are increased from hundred megameters to gigabytes, demands for high-traffic services in families such as Virtual Reality (VR) and ultra-high definition video are increasing.
Wi-Fi6 has two frequency bands of 2.4G and 5G/6G, and different frequency bands have different wireless penetration capacities. The attenuation of the 2.4G frequency band is smaller when the frequency band propagates in an obstacle, and the disadvantage is that the interference of the frequency band is larger and the transmission rate of the frequency band is slower in a wireless channel; the 5G/6G frequency band is wider, the interference is less, the network speed is stable, and the higher wireless channel transmission rate can be supported, and the disadvantage is that the attenuation is larger when the wireless channel transmission rate propagates in an obstacle. In indoor environments where FTTR is commonly used, there is a common occurrence of one or even multiple walls blocking wireless channel transmissions. For the situation that a plurality of walls are separated between the AP and the user, if the AP and the user perform data transmission, the 5G frequency band is used for data transmission, and the communication effect is inferior to that of the 2.4G frequency band.
Disclosure of Invention
Aiming at the defects or improvement demands of the prior art, the invention provides an FTTR resource allocation method for guaranteeing channel robustness, which aims to control by utilizing a frequency band of 2.4G so as to provide higher degree of freedom for resource allocation of data transmission between an AP and a user, judge whether the channel is suitable for data communication by using a 5G frequency band or not through SINR, decide which frequency band is used for communication between the user and the AP, then more accurately decide the condition that the user is connected with the AP by improving the channel robustness in data transmission between the AP and the user, and optimally allocate transmitting power and bandwidth so as to realize efficient FTTR resource scheduling, thereby solving the technical problem of low communication efficiency in the existing FTTR.
To achieve the above object, according to one aspect of the present invention, there is provided an FTTR resource allocation method for guaranteeing channel robustness, comprising:
s1: transmitting control signals to all users in the area through a 2.4Ghz frequency band by utilizing all wireless access nodes (AP); receiving response signals of the users to obtain SINR information and RSSI measurement values corresponding to the users; wherein,
receiving SINR information of an nth AP for an mth user; the RSSI measurement value corresponding to the nth user is the transmission power of the nth AP to the mth user in the FTTR network +.>
The method comprises the steps of carrying out a first treatment on the surface of the The response signal also carries the mth user to receive the transmission power +.>
And channel state information of mth user and nth AP->
；
，
；
For the total number of users>
Is the total number of APs;
s2: the control AP determines the communication frequency band of each user to be 2.4G frequency band or 5G frequency band according to the SINR information corresponding to each user;
s3: controlling the optical line terminal OLT to transmit power to each user according to each AP
And the respective users receive the transmission power from the AP +.>
And channel state information->
Making a resource scheduling decision to achieve a maximum instantaneous data transmission rate; the resource scheduling decision comprises: deciding a communication frequency band set of a user and an AP, connecting the AP set by the user, and distributing transmitting power and bandwidth.
In one embodiment, the constraint that all APs in S1 send control signals to each user in the area through the 2.4Ghz band is:
realizing that all the AP in the room can communicate with the maximum number of users when the communication in the 2.4Ghz frequency band is at the lowest signal-to-interference-and-noise ratio
；
For the connection state identification, 1 is used when the pairing is successful, otherwise, 0 is used;
At 2.4G frequencyThe upper limit of the total power of the segment AP.
In one embodiment, the S2 includes:
if it is
Judging that the mth user and the nth AP communicate by using a 2.4G frequency band; the SINR constraint is rewritten to ensure that the SINR information between each AP and each user is greater than the communication threshold of 2.4G band +.>
；
Defining an objective function as:
the constraint conditions are as follows:
wherein ,
for connection status identification,/->
Maximum number of communication users for all APs of 2.4Ghz band, +.>
Is the firstnAP to thmTransmission bandwidth of individual users->
Is the upper limit of the total power of the 2.4G band AP.
In one embodiment, the rewriting SINR constraint includes:
wherein ,
is the first time of data transmissioniAP to thmTransmit power of individual users>
Is the first time of data transmissionnAP to thmTransmit power of individual users>
Representing the average power of gaussian white noise.
In one embodiment, the S2 includes:
if it is
Determining that communication is performed between the nth AP and the mth user by using the 5G frequency band, and +.>
A communication threshold value of a 5G frequency band;
defining an objective function as:
the constraint conditions are as follows:
wherein ,
is the first time of data transmissionnA A is thatP to the firstmThe transmit power of the individual users;
Is the upper limit of the total power of the 5G band AP, < >>
Is the firstnAP to thmTransmission bandwidths of the individual users;
Is the upper limit of the total transmission bandwidth;
Is the channel condition when the AP utilizes the 2.4Ghz band, < >>
The AP uses the channel condition when the 5Ghz band is used for data transmission with the user.
In one embodiment, the incomplete channel station information CSI model utilized by all data transmission links in the 5G band is:
wherein ,
is the channel estimation error;
Is the continuous space spanned by the corresponding possible channel estimation errors, constant +.>
Representing CSI estimation error +.>
Is a maximum norm of (c).
In one embodiment, the SINR information received by the mth user for the nth AP is identified as:
According to another aspect of the present invention, there is provided an FTTR resource allocation system for guaranteeing channel robustness, for performing the FTTR resource allocation method for guaranteeing channel robustness, including:
the acquisition module is used for controlling all the wireless access nodes (AP) to send control signals to all users in the area through the 2.4Ghz frequency band; receiving response signals of the users to obtain SINR information and RSSI measurement values corresponding to the users; wherein,
receiving SINR information of an nth AP for an mth user; the RSSI measurement value corresponding to the nth user is the transmission power of the nth AP to the mth user in the FTTR network
The method comprises the steps of carrying out a first treatment on the surface of the The response signal also carries the mth user to receive the transmission power +.>
And channel state information of mth user to nth AP->
；
；
For the total number of users>
For the total number of APs, r is a subscript for +.>
And->
Distinguishing between the two is that the two are power, one is the transmitting power of the AP and the other is the receiving transmission power of the user;
the judging module is used for controlling the AP to determine the communication frequency band of each user to be 2.4G frequency band or 5G frequency band according to the SINR information corresponding to each user;
the decision module is used for controlling the optical line terminal OLT to be according to the transmitting power
Transmission power->
And channel state information->
Making a resource scheduling decision to achieve a maximum instantaneous data transmission rate; the resource scheduling decision comprises: deciding a communication frequency band set of a user and an AP, connecting the AP set by the user, and distributing transmitting power and bandwidth.
According to another aspect of the present invention there is provided a communication device comprising a memory storing a computer program and a processor implementing the above method when executing the computer program.
According to another aspect of the present invention, there is provided a computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements the above method.
In general, the above technical solutions conceived by the present invention, compared with the prior art, enable the following beneficial effects to be obtained:
(1) The invention firstly uses the frequency band of 2.4G to control so as to provide higher degree of freedom for the resource allocation of data transmission between the AP and the user, judges whether the channel is suitable for data communication with the 5G frequency band or not through the SINR, decides which frequency band is used for communication between the user and the AP, then in the data transmission between the AP and the user, more accurately decides the condition that the user is connected with the AP by improving the robustness of the channel, and optimally allocates the transmitting power and the bandwidth so as to realize efficient intelligent resource scheduling of the FTTR. In the FTTR scene, the invention considers the 2.4G frequency band or the 5G/6G frequency band to communicate and improves the channel robustness when the AP and the user carry out data transmission, can ensure that the users are scheduled as many as possible while having higher instantaneous data transmission rate, and achieves the effects of improving the number of the users and improving the Internet surfing experience of the users.
(2) The invention takes the total instantaneous data transmission rate as an objective function, considers that the AP only utilizes the 2.4Ghz frequency band to measure the channel, distributes power to schedule as many users as possible, so as to provide higher freedom degree for the resource distribution of the data transmission between the AP and the users, judges the channel through SINR when the AP and the users carry out the data transmission, selects the 2.4G frequency band or the 5G frequency band for carrying out the data communication, improves the robustness of the channel during the data transmission, flexibly adjusts the connection condition of the users and the AP, the transmitting power and the bandwidth of each AP, ensures the maximum user number and simultaneously achieves the maximum instantaneous data transmission rate, and ensures better user experience.
(3) The invention acquires SINR and RSSI of each user and AP in 2.4G frequency band prior to adjust user and AP and select channel condition, and adjusts the maximum number of users connectable to AP under the constraint of transmitting power and SINR; when the AP and the user carry out data transmission, judging the channel through the SINR, selecting a 2.4G frequency band or a 5G frequency band for data communication, if the 2.4G frequency band is selected for data transmission, improving SINR constraint in the 2.4G frequency band, ensuring that the SINR between each AP and the user is larger than the communication threshold of the 2.4G frequency band, reducing the interference of the 2.4G frequency band so as to improve the robustness of the channel, and then rewriting the SINR constraint, thereby converting the form into a second order cone and optimizing the problem to allocate bandwidth; if the 5G frequency band is selected for data transmission, incomplete CSI during data transmission is considered to improve the robustness of the channel, ensure better transmission performance and allocate bandwidth. Under the restrictions of SINR, power constraint and bandwidth constraint, the OLT performs resource optimization scheduling by using the proposed online algorithm, adjusts the set of user connection APs, and can ensure that not too much power and bandwidth resources are consumed while distributing the transmission power to reach the maximum instantaneous data transmission rate, thereby improving the network service effectiveness.
Drawings
Fig. 1 is a flowchart of an FTTR resource allocation method for guaranteeing channel robustness according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of a FTTR system in an embodiment of the invention.
Fig. 3a is a graph showing a comparison of the total instantaneous data transmission rate result of the FTTR resource allocation method for guaranteeing channel robustness and the first baseline scheme according to the embodiment of the present invention.
Fig. 3b is a graph showing a comparison of the total instantaneous data transmission rate result of implementing an FTTR resource allocation method for guaranteeing channel robustness and a second baseline scheme according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention. In addition, the technical features of the embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
The FTTR system allows only one user to transmit data on one channel, and if the AP and the user sense that there are other 802.11 radio transmissions on the same channel, collision avoidance will be automatically performed, and transmission is deferred, which results in that each user needs to use the channel in turn when the number of users is large. When the number of users of FTTR services is large, particularly when using the 2.4GHz band, too few available channels may be encountered. So when the AP communicates with multiple users on the same channel, the wireless signal can avoid collision and interference when the multiple users use the same channel for transmission through BSS Coloring mechanism. Meanwhile, the AP also needs to group users into different wake time (TWT) periods and coordinate wake time with the users. In the coordination process, the AP and the user exchange information with each other, and the information includes the expected communication duration. Under the action of the mechanism, the user can negotiate with the AP to carry out communication connection after waking up at a specific time, so that the number of users competing with the AP to establish communication at the same time after waking up is reduced. By using the two mechanisms, competition and overlapping situations when a plurality of different users communicate with the AP can be avoided.
As shown in fig. 1, the present invention provides a FTTR resource allocation method for guaranteeing channel robustness, including:
s1, during the control signal transmission period, the AP only uses a 2.4Ghz frequency band measurement channel, and obtains SINR information and RSSI measurement values, which are also called RSSI fingerprint data sets, according to user feedback.
RSSI information of system users is distributed to the transmission power of nth AP to mth user in FTTR network
dBm，
；
The information transmitted by the mth user comprises the transmission power received by the mth user from the nth AP
dBm, where->
，
Channel state information from the first user to the first AP on the 2.4G frequency band; the constraint conditions are as follows:
the OLT acquires the maximum number of users which can be communicated by all the APs indoors under the condition that the minimum signal-to-interference-and-noise ratio requirement of the APs when only utilizing the 2.4Ghz frequency band to measure the channel is met
。
S2, the AP judges the channel according to SINR fed back by the user, and selects 2.4G frequency band or 5G frequency band for data communication;
and S3, the OLT makes resource scheduling decisions, respectively decides a set of communication frequency bands carried out by the user and the AP, a set of user connection APs, and distributes transmitting power and bandwidth so as to achieve the maximum instantaneous data transmission rate.
It should be noted that, there is a certain correlation between the current channel state information of all users and the AP, and all the channel state information is transmitted to the AP to provide prior information for the subsequent.
In one embodiment, S2 comprises: if it is
And the nth AP and the mth user communicate by using the 2.4G frequency band. On the constraint condition of using 2.4G frequency band as control, the SINR constraint is raised
，
The method comprises the steps of carrying out a first treatment on the surface of the The SINR between each AP and the user is ensured to be larger than the communication threshold value of the 2.4G frequency band, so that the interference of the 2.4G frequency band is reduced, the robustness of a transmission channel is improved, the SINR constraint is rewritten, and the form is converted into a second order cone to optimize the problem distribution bandwidth.
In one embodiment, S2 comprises: if it is
Then 5G frequency is used between the nth AP and the mth userThe segments communicate. Due to channel estimation errors and feedback delays, in practice, only imperfect Channel Station Information (CSI) is typically available between the AP and the user. The resulting channel estimation error reduces the achievable transmission rate between the AP and the user.
In one embodiment, the present invention thus considers, without loss of generality, incomplete CSI transmitted on all data links on the 5G band. The CSI of the link under consideration is modeled as:
by improving the robustness of the channel, better transmission performance is ensured and bandwidth is allocated.
In one embodiment, the objective function is defined as:
the constraint conditions of the 2.4G frequency band include:
the constraint conditions of the 5G frequency band include:
the OLT connects the set of APs by deciding the user, allocates transmit power to achieve the maximum instantaneous data transmission rate.
wherein ,
is the first time of data transmissionnAP to thmThe transmit power of the individual users;
Is the upper limit of the total transmitting power during data transmission;
The upper limit of the total transmitting power is the upper limit when the AP only measures the channel by using the frequency band of 2.4 Ghz;
Is the firstnAP to thmTransmission bandwidths of the individual users;
Is the upper limit of the total transmission bandwidth.
Is the pairing situation of the nth AP and the mth user, successfully paired +.>
Otherwise, 0.
The AP only uses the 2.4Ghz band to measure the channel condition, and the +.>
Is the channel condition when the AP and the user perform data transmission, < >>
Is the channel estimation error.
Is the continuous null spanned by the corresponding possible channel estimation errorsConstant->
Representing CSI estimation error +.>
Is a maximum norm of (c).
The invention has the technical effects that:
1) In the 2.4G frequency band, according to the RSSI and SINR information between the user and the AP, obtaining an objective function, namely the maximum number of users which can be connected with all the APs, under the constraint that the minimum communication threshold is exceeded and the total power is not exceeded
。
2) After the maximum number of connectable users is obtained, when the AP and the users perform data transmission, the channel is judged through the SINR, the 2.4G frequency band or the 5G frequency band is selected for data communication, the total instantaneous data transmission rate is defined as an objective function, and the power and the bandwidth are optimized under the constraint that the total power bandwidth does not exceed a specific value and the limit of the SINR. I.e. solving two non-constant terms of the objective function. Alternately optimizing and distributing power and bandwidth, deciding the connection of users to the AP set, and obtaining the maximum instantaneous data transmission rate.
Specifically, there are M users in the system, and the set of users is
The method comprises the steps of carrying out a first treatment on the surface of the N APs, the set of APs is N +.>
。
The mth user in the system connects with the nth AP as a set
。
Indicating that the mth subscriber is connected to the nth AP,/->
Indicating that the user is not connected to the nth AP. Set->
One of them must be 1 and the other 0.
The AP and the user firstly select a 2.4G frequency band to control, and the signal-to-interference-and-noise ratio identification is carried out on the user m and the AP n:
the noise here is gaussian noise.
The maximum number of users problem is defined as
；
Wherein the constraint
The method is the lowest communication threshold for guaranteeing the SINR when the AP only measures the channel by using the 2.4Ghz frequency band; constraint
Is the transmit power. Subsequent->
Is +.>
。
When the AP performs data transmission with a user, a frequency band is selected for data transmission, and the instantaneous data transmission rate maximization is defined by the following random optimization problem:
；
wherein the constraint
When the AP only measures the channel by using the 2.4Ghz frequency band, the SINR constraint is carried out, so that each user can be ensured to establish communication with at least one AP. Constraint->
Is a limiting constraint on transmit power when using the 2.4G frequency band for data transmission.
Is the limit for matching the AP to the user. Constraint->
Is a limiting constraint on transmit power when using the 5G frequency band for data transmission.
Is a bandwidth limiting constraint in the overall data transmission process.
To facilitate the presentation of the optimal resource allocation algorithm in the subsequent section, and by
The property of not 1, 0, we have rewritten the equivalent form of the objective function +.>
；
wherein ,
。
considering that when the 5G frequency band is used for data transmission, better transmission performance can be ensured and bandwidth can be allocated by improving the robustness of the channel:
the objective function is rewritten as:
is of the same kind and pair
And (3) rewriting:
considering that when 2.4G frequency band is used for data transmission, SINR constraint can be improved, so that SINR between each AP and a user is ensured to be larger than a communication threshold value of 2.4G frequency band, interference of the 2.4G frequency band is reduced, channel robustness is improved, SINR constraint is rewritten, and therefore the form is converted into a quadratic cone optimization problem.
I.e.
，
；
The SINR constraint can be rewritten as:
，
the problem becomes:
；
the problem is that the maximum instantaneous data transmission rate is obtained by alternately optimizing the distribution power and bandwidth and deciding the connection of users to an AP set.
The FTTR resource allocation method for guaranteeing the channel robustness is suitable for a scene that multiple users are randomly distributed in the home, as shown in fig. 2, two APs exist in the room and are respectively distributed at the upper middle corner and the lower left corner of the top view of the room, each AP is connected to the same OLT through an optical fiber, and the OLT can intensively process the state information of all the APs to allocate the transmitting power and the bandwidth. The locations of the two individual users are randomly given.
Fig. 3a and fig. 3b are graphs of the FTTR resource allocation method for guaranteeing channel robustness and the instantaneous data transmission rates of the two base line schemes according to the embodiment of the present invention, which reflect the difference of the instantaneous data transmission rates between the different upper limits of the transmission power and the bandwidth. The baseline scheme is a fixed bandwidth, and the transmission power distribution is optimized independently; the bandwidth allocation is optimized separately with a fixed transmit power. As can be seen from fig. 3, the joint optimization of the transmit power allocation and bandwidth allocation in the present invention can result in a larger instantaneous data transmission rate compared to the two baseline schemes. It can also be seen that as the upper limit of the bandwidth, the allocable transmit power increases, the instantaneous data transmission rate is also greater.
The following describes an FTTR resource allocation system for guaranteeing channel robustness, where the FTTR resource allocation system for guaranteeing channel robustness described below and the FTTR resource allocation method for guaranteeing channel robustness described above can be referred to correspondingly.
The invention also provides an FTTR resource allocation system for guaranteeing the channel robustness, which is used for executing the FTTR resource allocation method for guaranteeing the channel robustness of the allocation system, and comprises the following steps:
the acquisition module is used for controlling all the wireless access nodes (AP) to send control signals to all users in the area through the 2.4Ghz frequency band; receiving response signals of all distribution system users to obtain SINR information and RSSI measurement values corresponding to all distribution system users; wherein,
receiving SINR information of an nth AP for an mth user;
The transmission power of the nth AP to the mth user is set; the response signal also carries the mth user to receive the transmission power +.>
And channel state information of mth user to nth AP->
；
，
；
For the total number of users>
Is the total number of APs;
the judging module is used for controlling the AP to determine the communication frequency band of each distribution system user to be 2.4G frequency band or 5G frequency band according to the SINR information corresponding to each distribution system user;
the decision module is used for controlling the optical line terminal OLT to respond to the transmitting power corresponding to each user
Transmission power
And channel state information->
Making a resource scheduling decision to achieve a maximum instantaneous data transmission rate; the allocation system resource scheduling decision comprises: deciding communication frequency band set of user and AP, user connection AP set and divisionTransmit power and bandwidth are allocated.
The invention also provides a communication device comprising a memory and a processor, the distribution system memory storing a computer program, the distribution system processor implementing the above method when executing the distribution system computer program.
The invention also provides a computer readable storage medium having stored thereon a computer program which when executed by a processor implements the above method.
It will be readily appreciated by those skilled in the art that the foregoing description is merely a preferred embodiment of the invention and is not intended to limit the invention, but any modifications, equivalents, improvements or alternatives falling within the spirit and principles of the invention are intended to be included within the scope of the invention.
Claims (10)
1. An FTTR resource allocation method for guaranteeing channel robustness, comprising:
s1: transmitting control signals to all users in the area through a 2.4Ghz frequency band by utilizing all wireless access nodes (AP); receiving response signals of the users to obtain SINR information and RSSI measurement values corresponding to the users; wherein,
receiving SINR information of an nth AP for an mth user; the RSSI measurement value corresponding to the nth user is the transmission power of the nth AP to the mth user in the FTTR network +.>
The method comprises the steps of carrying out a first treatment on the surface of the The response signal also carries the mth user to receive the transmission power +.>
And channel state information of mth user and nth AP->
；
，
；
For the total number of users>
Is the total number of APs;
s2: the control AP determines the communication frequency band of each user to be 2.4G frequency band or 5G frequency band according to the SINR information corresponding to each user;
s3: controlling the optical line terminal OLT to transmit power to each user according to each AP
And the respective users receive the transmission power from the AP +.>
And channel state information->
Making a resource scheduling decision to achieve a maximum instantaneous data transmission rate; the resource scheduling decision comprises: deciding a communication frequency band set of a user and an AP, connecting the AP set by the user, and distributing transmitting power and bandwidth.
2. The FTTR resource allocation method for guaranteeing channel robustness according to claim 1, wherein the constraint condition that all APs in S1 send control signals to each user in the area through the 2.4Ghz band is:
realizing that all the AP in the room can communicate with the maximum number of users when the communication in the 2.4Ghz frequency band is at the lowest signal-to-interference-and-noise ratio
；
For the connection state identification, 1 is used when the pairing is successful, otherwise, 0 is used;
Is the upper limit of the total power of the 2.4G band AP.
3. The FTTR resource allocation method for guaranteeing channel robustness according to claim 1, wherein S2 comprises:
if it is
Judging that the mth user and the nth AP communicate by using a 2.4G frequency band; the SINR constraint is rewritten to ensure that SINR information between each AP and each user is larger than a communication threshold of 2.4G frequency band;
defining an objective function as:
the constraint conditions for data transmission on the 2.4G frequency band are:
wherein ,
for connection status identification,/->
Maximum number of communication users for all APs of 2.4Ghz band, +.>
Is the firstnAP to thmTransmission bandwidth of individual users->
Is the upper limit of the total power of the 2.4G band AP.
4. The FTTR resource allocation method for guaranteeing channel robustness according to claim 3, wherein the rewriting SINR constraint comprises:
wherein ,
is the first time of data transmissioniAP to thmTransmit power of individual users>
Is the first time of data transmissionnAP to thmTransmit power of individual users>
Representing the average power of gaussian white noise.
5. The FTTR resource allocation method for guaranteeing channel robustness according to claim 1, wherein S2 comprises:
if it is
Determining that communication is performed between the nth AP and the mth user by using the 5G frequency band, and +.>
A communication threshold value of a 5G frequency band;
defining an objective function as:
the constraint conditions for data transmission on the 5G frequency band are as follows:
wherein ,
is the first time of data transmissionnAP to thmThe transmit power of the individual users;
Is the upper limit of the total power of the 5G band AP, < >>
Is the firstnAP to thmTransmission bandwidths of the individual users;
Is the upper limit of the total transmission bandwidth;
is the channel condition when the AP utilizes the 2.4Ghz band, < >>
The AP uses the channel condition when the 5Ghz band is used for data transmission with the user.
6. The FTTR resource allocation method for guaranteeing channel robustness according to claim 4, wherein the incomplete channel station information CSI model utilized by all data transmission links of the 5G band is:
wherein ,
is the channel estimation error;
Is the continuous space spanned by the corresponding possible channel estimation errors, constant +.>
Representing CSI estimation error +.>
Is a maximum norm of (c).
7. The FTTR resource allocation method for guaranteeing channel robustness according to claim 1, wherein the SINR information of the nth AP received by the mth user is identified as:
8. FTTR resource allocation system guaranteeing channel robustness, characterized in that it is adapted to perform the FTTR resource allocation method guaranteeing channel robustness according to any one of claims 1 to 7, comprising:
the acquisition module is used for controlling all the wireless access nodes (AP) to send control signals to all users in the area through the 2.4Ghz frequency band; receiving response signals of the users to obtain SINR information and RSSI measurement values corresponding to the users; wherein,
receiving SINR information of an nth AP for an mth user; the RSSI measurement value corresponding to the nth user is the transmission power from the nth AP to the mth user in the FTTR network
The method comprises the steps of carrying out a first treatment on the surface of the The response signal also carries the transmission power +.>
And channel state information of mth user to nth AP->
；
，
；
For the total number of users>
Is the total number of APs;
the judging module is used for controlling the AP to determine the communication frequency band of each user to be 2.4G frequency band or 5G frequency band according to the SINR information corresponding to each user;
the decision module is used for controlling the optical line terminal OLT to transmit power to each user according to each AP
And the respective users receive the transmission power from the AP +.>
And channel state information->
Making a resource scheduling decision to achieve a maximum instantaneous data transmission rate; the resource scheduling decision comprises: deciding a communication frequency band set of a user and an AP, connecting the AP set by the user, and distributing transmitting power and bandwidth.
9. A communication device comprising a memory and a processor, the memory storing a computer program, characterized in that the processor implements the steps of the method of any of claims 1 to 7 when the computer program is executed.
10. A computer readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor, implements the steps of the method of any of claims 1 to 7.
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